I've heard all these silly arguments about how it should be "Black to play and win" or "White to play and draw" or "White to play and keep material," but it is all junk to me. I think all that is necessary is "Black to play and make *the best move*." A good player should be able to figure out whether "the best move" leads to keeping material, a mate in X, gaining material, drawing the game, etc. That's how real games are anyway.